Method, device and equipment for locating defects of wind turbine blade and storage medium

By installing signal devices on the wind turbine blades and tower walls to acquire and process acoustic excitation signals, and combining composite sound field distribution and rotational speed information, high-accuracy positioning of wind turbine blade defects was achieved, solving the problem of insufficient accuracy in existing technologies.

CN122407473APending Publication Date: 2026-07-17TSINGHUA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIVERSITY
Filing Date
2026-04-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies have low accuracy in locating defects in wind turbine blades and are difficult to accurately identify internal damage and early cracks in complex environments.

Method used

By installing signal transmitting devices on wind turbine blades and multiple signal receiving devices on the tower wall, operational information is acquired and frequency-shifted acoustic excitation signals are received. Using preset composite sound field distribution information and blade rotation speed, the difference between the measured and theoretical instantaneous frequencies at the defect location is determined, achieving multi-directional data fusion verification.

Benefits of technology

It improves the accuracy of wind turbine blade defect location, can accurately capture defect information in complex environments, offset local deviations of individual devices, and ensure the reliability of location results.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a wind turbine blade defect positioning method, device, equipment and storage medium, and relates to the technical field of acoustic monitoring. The method first acquires the azimuth angle of a signal receiving device, the blade rotating speed and the initial frequency emitted by a signal emitting device, receives the acoustic excitation signal sent by the signal emitting device through the signal receiving device, and extracts the measured instantaneous frequency from the acoustic excitation signal; the speed component of different defect positions is determined according to preset composite sound field distribution information, the blade rotating speed and the azimuth angle, and the theoretical instantaneous frequency of different defect positions corresponding to each signal receiving device is determined according to the speed component and the initial frequency; the difference value between the measured instantaneous frequency and the theoretical instantaneous frequency of each signal receiving device is determined, and the defect positioning position of the blade is determined according to the difference value, so that the comprehensive difference value determined according to the difference values of all signal receiving devices is less than a set threshold. The embodiment of the application improves the accuracy of wind turbine blade defect positioning.
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